@digi2n... That image button doesn't work for some browsers and for photobucket or other hosts you don't need to use that stuff anyway because it provides the necessary code. Usually those types of buttons are for when you are hotlinking a raw URL. Pressing the button generates the code for you in that instance... but as I said I've never seen it work in Firefox or Opera. Probably works with IE and maybe Chrome but I don't use those.
Also, Peter, use the preview button under the comment box to check to see if your image code is working before submitting. Otherwise you may just end up with the URL in text form. Cheers.